90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
/*
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* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
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*
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* Inspired by libvolume_id by
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* Kay Sievers <kay.sievers@vrfy.org>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <stdint.h>
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#include "superblocks.h"
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struct via_metadata {
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uint16_t signature;
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uint8_t version_number;
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struct via_array {
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uint16_t disk_bit_mask;
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uint8_t disk_array_ex;
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uint32_t capacity_low;
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uint32_t capacity_high;
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uint32_t serial_checksum;
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} __attribute__((packed)) array;
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uint32_t serial_checksum[8];
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uint8_t checksum;
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} __attribute__((packed));
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#define VIA_SIGNATURE 0xAA55
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/* 8 bit checksum on first 50 bytes of metadata. */
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static uint8_t via_checksum(struct via_metadata *v)
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{
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uint8_t i = 50, cs = 0;
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while (i--)
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cs += ((uint8_t*) v)[i];
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return cs == v->checksum;
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}
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static int probe_viaraid(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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{
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uint64_t off;
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struct via_metadata *v;
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if (pr->size < 0x10000)
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return -1;
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if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
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return -1;
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off = ((pr->size / 0x200)-1) * 0x200;
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v = (struct via_metadata *)
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blkid_probe_get_buffer(pr,
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off,
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sizeof(struct via_metadata));
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if (!v)
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return -1;
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if (le16_to_cpu(v->signature) != VIA_SIGNATURE)
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return -1;
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if (v->version_number > 2)
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return -1;
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if (!via_checksum(v))
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return -1;
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if (blkid_probe_sprintf_version(pr, "%u", v->version_number) != 0)
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return -1;
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if (blkid_probe_set_magic(pr, off,
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sizeof(v->signature),
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(unsigned char *) &v->signature))
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return -1;
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return 0;
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}
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const struct blkid_idinfo viaraid_idinfo = {
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.name = "via_raid_member",
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.usage = BLKID_USAGE_RAID,
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.probefunc = probe_viaraid,
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.magics = BLKID_NONE_MAGIC
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};
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